Wild Kratts"Whale of a Squid"
Chris and Martin are taking Aviva's sub prototype out for a test drive when it gets sucked into a battle between a Sperm whale and Giant squid, spiraling down into the depths. The brothers want to follow, but their damaged sub can't take that kind of pressure. Aviva develops whale and squid Creature Power Suits, so the brothers can go where no sub has gone before. D

3:30 pm

Cyberchase"Send in the Clones"
(topic: Multiplication) - Hacker's plan to clone himself so he can wreak havoc throughout cyberspace in many places at once, goes haywire when his newly invented Clonitron clones Delete instead of himself. But Hacker takes advantage of the mishap by sending the Delete clones to takeover the R-Fair City cybersite. To complicate matters, every time Delete sneezes - his clones multiply even more. D

4:00 pm

Fetch! With Ruff Ruffman"How to Break The Ice and Also Waddle On It"
Ruff is getting ready to attend the annual convention for ARGSHAABPO, the Animal Reality Game Show Host and Aquatic Bird Performer Organization. Unfortunately, the convention will be attended by penguins, and Ruff just can't seem to relate to them. So he sends Isaac to the New England Aquarium to meet up with some penguins to get some pointers; and he sends Brian, Bethany, and Liza to learn the art of improvisation. D

4:30 pm

Arthur"Is That Kosher/Never Never Never"
Is that Kosher? - Joan Rivers lends her voice as Francine's sharp-tongued grandma, Bubba, in this episode about family traditions and communal celebration. Francine's convinced that she can fast on Yom Kippur just like her older sister. But then Arthur wins a free pizza party for all his friends for that very same day! Will Francine be able to resist? With Bubba's help, Francine learns that there's more to the special holiday than making it through a fast. D

Nightly Business Report
Tonight on Nightly Business Report. Google is one of this year's most talked about stocks. Today it closed above $900 a share as the company rolled out a new line of products. D

Nature"Great Zebra Exodus"
When thunderclouds begin to gather over Botswana's Kalahari each year, 20,000 zebras begin an ancient journey, as southern Africa's biggest animal migration gets underway. The story of this spectacular annual migration is told through the eyes of zebra stallions, their mares, and their young, revealing the trials and triumphs and the fascinating social bonds that hold zebra families together.G

8:00 pm

NOVA"Decoding Neanderthals"
A team led by geneticist Svante Paabo announces in 2010 they have reconstructed much of the Neanderthal genome, and the analysis shows modern humans and their Neanderthal cousins interbred widely outside Africa. The film looks at these findings and a range of new evidence for Neanderthal self-expression and language.G

9:00 pm

Secrets of the Dead"Cavemen Cold Case"
A tomb of 49,000 year-old Neanderthal bones discovered in El Sidron, a remote, mountainous region of northern Spain, leads to a compelling investigation to solve a double mystery: How did this group of Neanderthals die? And could the fate of this group help explain Neanderthal extinction? Scientists examine the bones and discover signs that tell a shocking story of how this group may have met their deaths. Some bones bear distinct signs of cannibalism. Was it a result of ritual or hunger? Neanderthal experts are adamant that they were not bloodthirsty brutes. D

10:00 pm

Life In Cold Blood"Land Invaders"
Among chorusing frogs in Panama, Sir David Attenborough asks how amphibians first managed to invade the land. The Australian lungfish, an ancient relative of the amphibians that can breathe air, and the giant Japanese salamander give vital clues about their first tentative steps. They also demonstrate their fiercely protective parenting skills. Part 2 of 5G